Centrifugal machine.



1 PATENTED DEC. 4, 1906. B. LJUNGSTRUM.

GENTRIFUGAL MACHINE.

APPLICATION FILED MAY 19, 1905.

2 SHEETS-SEEET 1.

No. 837,695. PATENTED DEC. 4- 1905.

B. LJUNGSTRGM. CENTRIFUGAL MACHINE.

APPLIGATIOH TILED MAY 19. 1005.

BIRGER LJUNGSTRUM. OF STOCKHOLM, SWEDEN, ASSIGNOR TO AKTI E- BOLAGETSEPARATOR, OF STOCKHOLM, SWEDEN, A COMPANY.

CENTFIIFUGAL' MACHINE.

Specification of Letters Patent.

Patented Dec. 4, 1906.

Application filed-May 19, 1905. Serial No. 261,141. v

To all whom it may concern:

-Be it known that I, BIRGER LJUNosTRoM,

a subject of the King of Sweden, residing at Stockholm, Sweden, haveinvented certain new and useful Improvements in Centrifugal Machines forSe arating Solid Matters from liquids; and I hereby declare the follow-vmg to be a full, clear, and exact description of the invention, such aswill enable others skilled in the art to which it appertains to make anduse the same, reference being. had to the accompanyin drawings, and toletters of reference marke thereon, which form a part of thisspecification.

My invention relates to improvements in centrifugal separators such asused for separating liquids fromsolid matters; and it more particularlyrelates to arrangements for transporting the solid matters down theinner wallof the bowl to the devices in the bowl by which theircontinuous carrying away from the separator is performed.

As is described in the Umted States Patent No. 773,489, the solidmatters that stratify along the inner wall of the bowl are broughtoutside the bowl by means of scraper-wheels car through the layer ofliquid to a point within the same nearer the center of the bowl,

whence the solid matters are continuously carried away in such a mannerthat they immediately before the scrapers of the scraperwheels occupytheir position nearest the center of the bowl, owmg to the action of thecentrifugal force and their own ravity, are

loosened from the scrapers and t en thrown downward through a centralope into a partition placed under the scraper-w eels or in the verybottom of the bowl. Other constructions are also known-as, for instance,such where the carrying away of the solid matters is effected by meansof screws or the like. (Compare United States Patent No. 785,910.)

My present invention is appjlipable even to that kind of centrifugal maces and to all sorts of separators for separating solid matters fromliquids wherev the solid matters strat' along the periphery of the bowl.

In t e United States Patent- No. 773,489 a centrifizgtal machine withoutliner and with a conical owl that is relatively low is detrifugal bowlwith my improvements the solid matters transversely scribed. In suchcentrifugal bowls the solid matters on account of the action ofthe'ce'ntrifugal forcefwill slide on the wall of the bowl and be thrownout to the parts of the bowl that areat the greatest distance from thecenter line of the bowl. If, however, the

bowl is provided with a liner that diyidesthe bulk of the liquid in aradial direction'into thin layers, the bowl must be made relativelydrical wall. In this case the solid matters should amass along thecylindrical part bf the bowl and there form a layer reaching up-ibetweenthe plates, and thereby the separating process would cease. In this caseit is thus necessary to provide means for preventing this.

My resent. inventions relate to such means or ca awa the solid mattersdown or around the wall of the bowl to the device by which they arecarried away out of the bowl. l

The device is illustrated on the annexed drawings, wherein-:-

.Figure 1 1s a vertical section of a cen a plied thereto. Fi 2 is aplanview of a l under part of the bowl, the cover as well'as the linerbeing removed. Figs. 3' and 4 each show in section other embodimentsoffmy invention.

The bowl consist-f an upper part or cover a and an under part or bottom.I), screwed together in the usual manner. In the bottom of the bowl thedevice for carryingawa the solid matters out of the bowl is locate Fi 1shows this device in conformity with th United States Patent No. 773,489 but high and with partly conical partlyi ,.oyli n I other devicesfor carrying away the solid matters out of the bowl may be used. I Thebottom b is provided with a central circular o ening the edge of whichinclines outward. e driving-shaft c of the bowl is enlarged at the topto a flange d, riveted to the bottom of the bowl or integral with it.Between the flange (1 and the bottom I) of the bowl chan. nels d d, oening outward, are located. The driving-s aft 0 is hollow, and the samethe massive shaft e projects, on thet'o of which a disk 1' is mounted.To dis shafts g g are secured in a suitable manner. On'these shafts thescraper-wheels h h: and

the cog-wheels i i turn. The cog-wheels i '5 mesh wit-ha cog-ring on'acentral -disk 70, secured to the hollow shaft 0, so as torotate with thebowl. By this arrangement the shafts g g and the cog-wheelsi'z' andscraperwheels, h h-will receive a-motion relative. to the bowl as soonas the shaft 2 is rotated with a speed different to that of the shaft 0.

\ At the same time the scraper-wheels h It will to "rotate on theirshafts 9 9 as the co wheels 'ii mesh with the cog-ring on the dis 7According to my present invention the I carrying away-of thesolidmatters separated from, the liquid in the liner 1 and stratifyingonthewalls of the bowl are brought down to broughtoutside the separatorby means of I hthedscraperwheels. This is "eifected by means of inclinedscrapers m, secured to the so disk -ni arsmtable manner. The'scrapers mextendfiritothespace between the liner Z and the bowl. When the-disk frotates relative tQItheZboWl, thescrapers m'will continuously Scrapethesolid matters down the periphery cannotg amass' at'the periphery of thebowl,

"ardto the device y which t 'ey. are

out of the bowl; 3 Y

3 .my presentinvention is applied tganother constructional form. Thescraper j; wheels-are here omitted, and between the eovfer. and thebottom of the bowl the dis ng care provided. in the upper part 0 the"owli, he scrapers m' are secured to the j ,p'ut'in rotary motion bymeans of the ,fs'haft ;,at' a' speed different from that of the bowl. vIt does not matter in which direction the fscrapers move, the effectbeing only that in the one case thesolid matters leave the Fifseparatorthrough the openings a and the I lliquid through -theo'penings'o. In the opporangementiis illustrated in Fig. 4. The Pen Iforat'ed drum '1) is secured'to the disk f by i meanspf stays or thelike. On this drum p the scrapers m are secured in form of threads Ibynieans of screws 7 j; f; 'tlre'constructional form shown in Fig. 4'

thedevices for transporting the Solid matters 'o'utside the separatormay be of any kind. 1 whatever. .-On the drawings scraper-wheels areshown in conformity with Fig. 1. It is,

however, evident that screws or other de- 01' inany other suitablevices-for carrying away the solid matters out of the bowl may be used;Instead of a arathebottom of the bowl, from where theyfare of the"bowl." In this way the solid matters [continuously scra ed oil andressed arg'e -opemngs n are located. Other o en -tion a. rotary bow Thenit same;

scra ers and the rings.

7 Vl hat .l'claim isv 1 7o 1. Ina centrifugal machine for separatingsolid matters from liquids, the combination with a rotary bowl having aliner, consisting, of a serles of plates intersecting the radlal line ofthe bowl, of one or more inclined scra erslocated in the space betweenthe bow and the liner and rotating with a speed different from that ofthe bowl. 2-. In a centrifugal machine for separating solid matters fromliquids, the combination with a rotary bowl having a liner, consistingof a series of plates intersecting the radial; line of the bowl, of' oneor more inclined scra ers located inthe space between the bow and theliner and means to rotatesaid 5 icrapers at a speed different from thatof the OWL." r

3. In a centrifugal machine for separating solid matters from liquids,the combination with a rotary bowl having'a liner, consisting ol aseries of plates intersecting the radial line ofthe'bowl, of one or moreinclined scra ers located in the space between the bowl and the linerand means to rotate said I scra ers at a speed difierent from that'ofthe bow and means for carrying away the sohd matters, scraped down bythe scrapers, out of the bowl. 1 4. In a centrii'ug .l separatoriii-combinal, a liner fixed thereto, a hollow shaft there being anoutlet between the walls and the shaft, a second shaft projectingthrough said hollow shaft and constructed to be rotated with a speeddifferent from that of the bowl, a horizontal flange secured to saidsecond shaft, one or more scraper-wheels journaled in said flange and aperforated drum fixed to said flange and proj ecting in the spacebetween the bowl and the liner, the exterior of said drum provided withinclined scrapers inform-of. threads forconveying the solid mattersStratified on. the walls to the scraper-wheels.

5. In a centrifugal machine, for separating" solid matters from liquids,the combination with a rotary bowl having a liner, of a skeleton frame,between said liner and the Wall of the bowl, and inclinedscraper orscrapers se cured to said frame and means to rotate said frame at aspeed different from the speed of r2 the bowl- V I 6. In acentrifugalmachine for separating solid matters from liquids,thecombination With'a rotary bowl havin a liner, of a perfo-. rated drumbetween said liner and the" wall of the bowl, the exterior of said drumh'aving;

one or more inclined scrapers, and means to rotate said drum at a speeddifferent from the speed-of the bowl. 'f l- 7 a centrifugal machine forseparating I 0 837.695 I &

solid matters from liquids, the combination, 1n I eSftiHiOIl that Iclaim the foregoing as with a r tary bowl, having a liner, of a' perfomyinvention have signed my name in pres rated drum between said liner andthe Well encef'of two subscribin witnesses.

of the bowl, the exterior of said drum having BIRGE- """LJU N GSTROM.one or more spiral scrapers, and means to ro- Witnesses: v

tatesaid drum at a speed different from the K. E. WI'BERG,

speed of the bowl. HARRY ALBIHN.

